Introduce shared/defines.h to collect commonly used macros. For now

it defines min() / max() macros.

clients/lcdproc/main.h

@@ -1,6 +1,8 @@
 #ifndef MAIN_H
 #define MAIN_H
 
+#include "shared/defines.h"
+
 #ifndef TRUE
 # define TRUE    1
 #endif
@@ -61,12 +63,4 @@ const char *get_hostname(void);
 const char *get_sysname(void);
 const char *get_sysrelease(void);
 
-#ifndef min
-# define min(a,b) (((a) < (b)) ? (a) : (b))
-#endif
-
-#ifndef max
-# define max(a,b) (((a) > (b)) ? (a) : (b))
-#endif
-
 #endif

clients/lcdvc/lcdvc.h

@@ -1,11 +1,11 @@
 #ifndef LCDVC_H
 #define LCDVC_H
 
+#include "shared/defines.h"
+
 #define CHAIN(e,f) { if( e>=0 ) { e=(f); }}
 #define CHAIN_END(e) { if( e<0 ) { report( RPT_CRIT,"Critical error, abort"); exit(e); }}
 
-#define min(a,b) ((a)<(b))?(a):(b)
-
 #define UNSET_INT -1
 #define UNSET_STR "\01"